The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1993
Filed:
Feb. 20, 1991
Akio Aoki, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There are provided an error correction circuit for correcting a code error of a compressed information code train having been reproduced from a recording medium, compressed in information amount by compression encoding, and added with an error correction code, by using the error correction code, an expansion circuit for subjecting the compressed information code train outputted from the error correction circuit to decoding corresponding to the compression encoding, and expanding the information amount of the decoded code train, an error concealment circuit for concealing an information code of the information code train outputted from the expansion circuit, by using correlation of the information, the information code being unable to be corrected, and a compression circuit for compression encoding again an information code train outputted from the error concealment circuit. For an information code unable to be corrected, the information code train outputted from the compression circuit is recorded in another recording medium, whereas for the other information code, the compressed information code train to be inputted to the expansion circuit is recorded in the other recording medium. Accordingly, an information code to be subjected to information expansion and second compression processes for dubbing is limited as small as possible, thereby minimizing information deterioration to be caused by such processes.